B)56.5
C)88.7
D).254.3
Answer:
D) 254.3
Step-by-step explanation:
The formula for the area of a circle is πr^2
so it would be, 3.14 x 9 x 9= 254.34
then just round your answer to the nearest tenth to get 254.3
Hope this helps! Let me know if you need help with anything else!
The polar form of equation is r = -8sinθ.
The combination of the complex number's modulus r and argument is how complex numbers are shown in polar form z = r cosθ + i r sinθ = r (cosθ + i sinθ), is the polar form of a complex number with coordinates (x, y). In the coordinate system, polar coordinates of real and imaginary numbers are used to represent the polar form.
Given x² + (y + 4)² = 16
here The following is the relationship between (r, θ) and (x, y) if they are in Cartesian form:
x = rcosθ, y = rsinθ and r² = x² + y² ad tanθ = y/x
x² + (y + 4)² = 16
x² + y² + 16 + 8y = 16
x² + y² + 8y = 0
r² + 8rsinθ = 0
r(r + 8sinθ) = 0
r =0 and r = -8sinθ
Hence the polar form of equation is r = -8sinθ.
Learn more about polar form of complex number;
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Answer:
c. r=-8sin(theta)
Step-by-step explanation:
edge 2021
Answer:
The mean speed of the automobiles traveling on this road is the closest to 65 mph.
Step-by-step explanation:
frequency distribution of speeds.
Speed (mph) | Frequency
45 up to 55 | 70
55 up to 65 | 360
65 up to 75 | 250
75 up to 85 | 110
Using the midpoint method, we represent each group/class of speeds with the midpoint speed, then go ahead to compute the mean.
Let the speed be x
The frequency be f
x | f
50 | 70
60 | 360
70 | 250
80 | 110
Mean = (Σfx)/(Σf)
Σfx = (50×70) + (60×360) + (70×250) + (80×110) = 51,400
Σf = 70 + 360 + 250 + 110 = 790
Mean = (Σfx)/(Σf)
Mean = (51400/790) = 65.06 mph ≈ 65 mph
The mean speed of the automobiles traveling on this road is the closest to 65 mph
Hope this Helps!!!
B. We can't determine from the given information.
C. Exactly one
D. None
Answer: first pic: true. second pic: is D. third pic: false. forth pic: C.
Step-by-step explanation:
Answer:
24+24=48
Step-by-step
24+24=48